Tire rasp



P. C. NEILSEN Nov. 29, 1949 TIRE RASP 2 Shets-Sheet 1 Filed Sept. 27, 1947 INVENTOR. feez" C//ziere any/@P71695 Nov. 29, 1949 P. c. NElLsE-N 2.489.803

TIRE RASP Filed Sept. 27, 1947 2 Sheets-Sheet 2 INVENTpR. Feier' CTI/1, sera Patented Nov. 29, 1949 UNL semble and one wherein the operation. ofsteple? 5 ingworn out'or broken raspteeth issimpleanx can be accomplished rapidlyl without reqnirhx., thezuseo! holdingictures andthe. like to thevarious-parts while the teeth. arebeingiinserted" The 4foregoing constitute some of the principal" objects vand advantages of" the present.4 invention; others orwhich will' become apparent ifif'omt. thefollowingl description .and the drawings; im, which'4 l Figrtls a side elevational View of a complefl; assembled rasp embodying the present .inven tin? Pigs 2 isf a transverse sectional "view taken tlroughrthe rasp'along theline '2 2 otliig 15:.,

'M2153 is an enlarged :fragmentary side eleva:- tional* view corresponding to Fig. 1 but with'a ppr'- tiorr shown Vbroken away 'and shown inu sectlon;

Fits-tls aplan'detailview of one of theA toothed?? Z snacedrinsparallel relationship. about the outer peripheralface of .thebacking ring 25.`

Referring` particularly to Fig.` 3 a. plurality -fotl toothed, element supportingy members 21 in the Q fcirm of channelshaving downwardly projecting,

legslld. aremountedon .theioutex' surface of .theN backing. ring. 25 4with the ylegs 21a projecting.. downwardly into. transversely extendingS enemiesfr 26,.

indicatedY by the bracket Ae, which rows extend.

lengtliwi'slealong` thaupperiace of the clfiannel-4 supportZT. As shown twoof such pairs of rows.

Mofapertures Zllare` provided .in eachchannel.

member 2T.thoughof course, this, number can be varied.- The channel shapedsupporting memviddiand comprises an elongated 'platedike element'ilthatY has a plurality of. teeth 3| disposed.- along each of the side, edges ofthe element` element supporting`l members shown with. th'efgifrliese teeth l are pointe'ctand. all extend in partoothedfelements `in place:

5 is aside elevational viewofltl'fe esserne blbsh'ownin Fig; 4,*

Fig. Gis an endelevatonal vlew'of theasseme bly-illustratedin Figs.-4 and''i'; 'and' elements.

Por purposes of'ihustration asi'ngie'embofdt' ment-only of thepresent irivei'itioiris'A showiranif modifications wll'loceur to the man -skllle'zrm the" arttand4 it is intendedithatsueh modicatious mayxbe made-without departing-from 'the 'soupirA of the invention.

allel relationship with respect to each other in a. direction substantially ,at 'right angles tothe general plane of the plate-like element 3U.. The teeth on each side4 ofthe plate-like element 3l!" awlarespaced at'eqnal distances apart and the teeth Fig. 7 is a perspective view of one of the toothed* along one4 edge are offset .with respect to the correspondingjteeth along the other.edge of the toothed member 29 so that ineffect all of the tee'tl'fare ,staggered-'with respect to each other. Siiilarythe apertures 28.in each pair of rows inthe channel shaped supporting member 21 are staggered'and theinspacing and arrangement` correspond to the arrangement of -the teeth 3l. Thus-the toothed member 29 is adapted to be Rleferringto the-drawings and particularly tolleplaced with its plate-like element 311 against the.

1"and'2 the `invention is illustrated"ltrtltt` fomenta-tire rasp generally indicatedat I5 that comprises'generally a pair of webbed side` members IEr provided with' annular flanges' f1 Lth'axt" underneath face ofthe channel shaped supporting-member 21 and With the'teeth 3| projecting through the apertures 28.` Two of such toothed elements 29 can be inserted into each of the chan-` form bearing surfaces upon which is mountedjalrmnel'- shaped supporting members 21 as shown` in annular band assembly INthat forms theperipll eral faeeloftherasp; The webbed side members IE are mounted cuan arlzulrV l! that is threaded on its free end as at 20to receive a nutriti yand a locking nut 22'. slde members I6 is disposed againstra shhulabr: 23 on the arbor i9. The bandassemblyl comprises an inner cushion ring 24 of rubber or any other sul-table resilient material that rests direct-lia 'upon-:the faces of flanges I1. cushion 2id is'a toothed element backing ring-Elf'L thsts provided with outwardly extendingngef' portions v25u at its outer periphery.

backing ring 2d is grooved transverselwns'.v

O'ile ofthe-Webber? 60,

supporting member 21 with Vits toothed elementsl Mounted onA this-1:55

the drawings; As previously suggested the number-of toothed elements 2S to be applied to Veach ch'armel shaped supporting member 21 can be varied.

Thus an assembly comprising-a channel shaped` 29 in place can very readily be mounted on the baekmg'rng 25 as 'shown in Fig. 3 with the legs Ila'orthesupporting member 21 projecting. downwardly iritoa pair of spaced grooves 25. The toothed elements 29 are thereby held between the upper'portion of the supporting member 2.1 and the'peripheral face of the backing ring 25. Itis. obvious that the steps o f applying. suchan assetti,-V

t Wise@ Fig: 3), thegrooves-being unil'omrl'roo bly'tothebacking ring linvolvesthe very sim..

Each. OLthese supporting members. 1d ZTs shown.inFig 4isprovided with a plurality `ot apertures. 28 arrangedin pairsiol` parallel rows;

at the opposite ends of each leg. f V

Referring now to Fig. 2 the anges I1 oi each v` ,of the webbed side members I6 of the rasp are 1 provided with upwardly and inwardly disposed l ange portions 33 and 34 respectively, the inwardly projecting flange portion 34 being disposed horizontally and in spaced relationship A with respect to the previously mentioned anges l1. When the toothed element supporting members 21 are disposed in place on the backing ring with their downwardly projecting legs 21a. extending in the grooves 2E the sides of the legs 21a project beyond the side margins of the4 backing ring 25 in the region below the anges 25a on the backing ring. Thus the V-notches 32 project beyond the side faces of the backing ring 25, and are disposed immediately below the flanges 25a. The inwardly turned nanges 34 on the webbed side member I6 are adapted to project into the V- shaped notches 32 and all of the downwardly projecting legs 21a of the channel shaped toothed element supporting member 21. These Ilanges 34 may be tapered on their free edge to correspond with the slope of the lower side of the V-notches 32 so that these flanges 34 serve as wedges in the V-notches that pull the channel shaped supporting members 21 rmly into place and hold them in this condition. When the assembly has thus been completed the nut 2| is drawn 'u'p tight on the threaded end 2li of the arbor i3 and the lock nut 22 locks the assembly in place. Thus all of the channel shaped supporting members 21 are rrnly locked in place on the backing ring 25 and the toothed elements 29 are firmly held in the manner previously described.

The rasp is now in condition for use so that upon rotation of the arbor I9 the rasp is rotated. A tire casing or the like can now be brought into engagement with toothed surface of the rasp for the purpose of preparing the tire surface for vulcanizing, recapping or the like.

To disassemble the device in the event certain of the teeth become worn out or broken the nuts 2i and 22 are removed from the arbor I9 so that the rasp can be disassembled upon removal of one of the webbed side members I6, with the resulting removal of the locking ange 34 from its engagement with the V-shaped notches 32 at one side of the legs of the channel shaped supporting mem bers 21 the channel shaped members are released so that one or more containing the faulty teeth can be slid out for replacement of the toothed element containing the faulty teeth. A new toothed element can then be inserted and the channel shaped member quickly replaced and locked in the manner previously described. This all can be accomplished in a very short period of time without requiring special tools or fixtures to make this replacement.

I claim:

1, A rasp of the class described comprising a to the spacing of the grooves. and a web portion provided with a plurality of apertures therethrough, and tooth elements having teeth projecting through the apertures,- each ,support being adapted! to straddle the distance between two adjacent grooves with one leg disposed in a groove,

: and locking means engaging the supports to fix the latter on the band.

I 2. A rasp oi the class described comprising a drum including a peripheral band portion, transversely disposed grooves in the band portion spaced throughout the circumference of the band portion, a plurality of toothed element supports mounted on the band and each being in the form substantially of a channel member having downwardly projecting legs spaced apart to correspond to the spacing of the grooves, and a web portion provided with a plurality of apertures therethrough, and tooth elements having teeth projecting through the apertures, each support being adapted to straddle the distance between two adjacent grooves with one leg disposed in a groove,r

and a ilange on the side members engaging the toothed element supports to lock the latter in place- 31 A rasp of the class described comprising af drum including a peripheral band portion, trans-l versely disposed grooves in the band portion spaced throughout the circumference of the band portion, a plurality of toothed element supports mounted on the band and each being in the form substantially of a channel member having down- Wardly projecting legs spaced apart to correspond to the spacing of the grooves, and a web portion provided with a plurality of apertures therethrough, and tooth velements having teeth projecting through the apertures, each support being adapted to straddle the distance between two adjacent grooves with one leg disposed in a groove,

each of the toothed element supports having locking slots adjacent to each end thereof, and a flange on each of the side members engaging the locking slots on the corresponding sides of the toothed element supports to lock the supports in D1iie 4. A rasp of the class described comprising a drum, transversely disposed grooves in the peripheral surface of the drum spaced circumferentially thereabout, a plurality of toothed element supports mounted on the drum, each being in the form substantially of a channel member having downwardly projecting legs spaced apart to correspond to the spacing of the grooves, and aweb portion provided with a plurality ofapertures therethrough, and toothed elements having teeth projecting through the apertures, each support being adapted to straddle the distance between two adjacent grooves with one leg disposed in a groove, and locking means engaging the supports to fix the latter on the drum.

PETER C. NEIISEN.

REFERENCES CITED The vfollowing references are of record in the file of this patent:

' UNITED STATES PATENTS 

